Mineral oils: processes and products – Refining – Nitrogen contaminant removal
Patent
1980-02-01
1981-10-27
Gantz, Delbert E.
Mineral oils: processes and products
Refining
Nitrogen contaminant removal
208 8LE, 208 11LE, 208 57, 208 78, 208143, 208 87, 208 88, 208 96, 208210, 208211, 208236, 208240, 208289, 208291, 208311, 208318, 208326, 208335, C10G 4502, C10G 6704
Patent
active
042972060
ABSTRACT:
An improvement in the solvent extraction of nonhydrocarbons from a synfuel liquid, e.g., shale oil, involves that the extract from the extractor, rather than being recycled directly back to the extractor, is first hydrotreated. A further improvement involves that a portion of the hydrotreated extract is fractionated and a light fraction is returned to the extractor. Use of the hydrotreated extract as recycle increases the efficiency of the extractor. A still further improvement involves the use as a selective solvent of one of the following: dialkylformamide, aldehydomorpholine, keto-morpholine, morpholine or an aliphatic aromatic ketone. These preferred solvents have the advantage of providing a clear interface between the extract and raffinate in the extractor. Removal of the nonhydrocarbons permits production of more hydrocarbons having enhanced utility as a jet fuel from a synfuel liquid than otherwise would be possible.
REFERENCES:
patent: 2026812 (1936-01-01), Birkhimer
patent: 2067137 (1937-01-01), Clarke
patent: 2279550 (1942-04-01), Benedict et al.
patent: 2287736 (1942-06-01), Hersberger
patent: 2357667 (1944-09-01), Kuhn
patent: 2906693 (1959-09-01), Donaldson
patent: 4159940 (1979-07-01), Smith
Baker Patrick C.
Gantz Delbert E.
Hess J. Edward
Johnson Donald R.
Schmitkons G. E.
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